真核起始因子6抑制小鼠肾间质纤维化的组织学研究

摘要

目的：通过建立小鼠单侧输尿管结扎（UUO）模型，探讨真核起始因子6（eIF6）在肾间质纤维化中的作用。方法建立 eIF6＋/-和 eIF6＋/＋小鼠 UUO模型；用 HE和 Masson染色观测小鼠肾间质胶原沉积程度，免疫组化方法观察α-平滑肌肌动蛋白（α-SMA）、转化生长因子β1（TGF-β1）的表达与分布变化，并进行图像定量分析。结果 UUO模型 eIF6＋/-小鼠在建模后10 d出现比eIF6＋/＋小鼠更明显的肾纤维化；在UUO模型中，eIF6＋/-小鼠的肾小管区比eIF6＋/＋小鼠的肾小管区表达更多的TGF-β1和α-SMA。结论 eIF6可能通过影响TGF-β1的表达参与调控肾间质纤维化。%Objective To investigate the possible role of eukaryotic initiation factor 6(eIF6)in the development of kidney inter-stitial tissue fibrosis in a mouse model of unilateral ureteral obstruction(UUO).Methods (1)UUO model was set up in eIF6+/-and eIF6+/+ mice.(2)HE and Masson staining were used to histologically assess the interstitial deposition of collagen in mouse kidney.Immunohistochemistry and image analysis were applied to analyze the expression of α-SMA and TGF-β1 in mouse kidney as well as eIF6 in human kidney samples.Results 10 days after unilateral ureteral obstruction,more kidney interstitial fibrosis tissues were found in eIF6+/- mice than that in eIF6+/+ mice.TGF-β1 andα-SMA were expressed more intensive in tubular epithelial cells of eIF6+/- mice than that of eIF6+/+ mice in the UUO model.Expression of eIF6 is lower in the region of fibrosis than that in non-fibrotic area.Conclusion eIF6 might be involved in the development of kidney interstitial tissue fibrosis by regulating the expres-sion of TGF-β1 .